Time resolved Raman studies of laser induced damage in TiO/sub 2/ optical coatings
Molecular information available from Raman scattering measurements of sputter deposited TiO/sub 2/ on silica substrates has been used to characterize crystalline phases, thickness, and surface homogeneity. A two laser technique is described for investigating transient molecular changes in both coating and substrate which result from pulsed 532 nm laser irradiation. Single layer and multilayer coatings of both anatase and rutile phases of TiO/sub 2/ have been probed by Raman spectroscopy immediately following the damage pulse (nanoseconds) and at longer times. Transient measurements are designed to follow surface transformation/relaxation phenomena; measurements at longer times characterize the equilibrium damage state.
- Research Organization:
- Pacific Northwest Lab., Richland, WA (USA); Air Force Weapons Lab., Kirtland AFB, NM (USA)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 6140792
- Report Number(s):
- PNL-SA-12573; CONF-8410186-2; ON: DE85003116; TRN: 85-000248
- Resource Relation:
- Conference: Symposium on optical materials for high power lasers, Boulder, CO, USA, 15 Oct 1984
- Country of Publication:
- United States
- Language:
- English
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